529 Copyright © 2011, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 2.18 DOI: 10.4018/978-1-60960-587-2.ch218 abstraCt This chapter describes a model for evaluating complex organizations or systems. The design assessment model the authors propose is a re- sponse to current notions of assessment. There are assumptions we make about learning and the functioning of complex systems such as academic programs that do not match assumptions that are inherent in traditional forms of assessment. The authors use a case study of Purdue University’s strategic planning process to provide the context for describing how design assessment takes place in a higher education setting. Based on interviews and observations, we identify areas problematic for some notions of assessment and distinguish several implications based on these findings. The design assessment model may be useful when assessing complex educational organizations or programs, such as when (a) educational entities at the university level need to assess new pro- grams or curriculum materials; or (b) curriculum developers need to assess new software or tools for instruction. Melissa A. Dyehouse Purdue University, USA John Y. Baek Center for Advancement of Informal Science Education, USA Richard A. Lesh Indiana University, USA Multi-Tier Design Assessment in the Development of Complex Organizational Systems